on the Rock River Arms website. They had Two Stage Match triggers going for $62. They are currently on sale at $85 but normally retail for $120. Unfortunately, they didn't tell me they didn't have any in stock. I ordered it over a month ago and a week ago they finally told me they were shipping triggers ordered on Dec 23. So I figure I'm a week or two out from getting the trigger.
I'll have to try the ALG on a future build.